There are 12 words that start with 'yeast'.
| yeast | yeasts | yeasty |
| yeasted | yeastier | yeastily |
| yeasting | yeastiest | yeastless |
| yeastlike | yeastiness | yeastinesses |
Note: These 12 words that start with 'yeast' are found from the USA & Canada version of the tournament Scrabble word list.